The second day of expert-level nuclear talks between Iran and the five permanent members of the UN Security Council plus Germany has kicked off in the Austrian capital of Vienna.

Experts from Iran and the six world powers are working to hammer out a comprehensive deal following a landmark nuclear accord reached in Geneva last November.

On the first day of the talks on Wednesday, the experts discussed uranium enrichment, Arak heavy-water reactor in central Iran, and peaceful nuclear cooperation with Tehran.

Senior Iranian nuclear negotiator Abbas Araqchi said late Wednesday that the Islamic Republic entered negotiations with the six world powers - the US, France, Britain, Russia, China and Germany - in order to build confidence over its nuclear energy activities.

“We did not give any concession to the Western side, but we built confidence to protect the Iranian nation’s dignity and independence,” he said.

Under the Geneva deal, the six countries group undertook to provide Iran with some sanctions relief in exchange for Iran agreeing to limit certain aspects of its nuclear activities during a six-month period. Based on the agreement that took effect on January 20, it was also agreed that no nuclear-related sanctions would be imposed on Iran within the same timeframe.

Iran’s ambassador to the International Atomic Energy Agency (IAEA), Reza Najafi, said on Wednesday that there have been positive developments regarding the implementation of the nuclear deal.